I do think LibraryThing could be a good way to go, though I appreciate your concern. LibraryThing's librarian is a zine advocate. Having a member library to work with might help her efforts to make LT more zine friendly. She should also be able to respond appropriately to your content concerns.

Almost any solution will cost a little dough, so if you'd rather spend it on software than labor, you could look into Athaeneum. I believe it's more or less an adapted version of FileMaker Pro (which kicks MS Access's ass). Email the folks at QZAP to get their take on it. I do not recommend Microsoft Access.

A potentially free option would be a hosted WordPress or Blogger blog. Ms. Valerie Park is a zine distro that uses the latter.

If you can wait until they offer hosting, I recommend Omeka. It's an images/archives friendly catalog that I think is a little more 21st century and possibly more out of the box friendly than some of the other tools out there. The Barnard Center for Research on Women recently implemented Omeka for their print ephemera collection. They did have to pay a developer a couple hundred bucks (not sure of exact cost) to help them with their install.